A/C problem - stuck in ECON
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Cadillac DeVille 1985 to 2005 including:
1985-1992 Fleetwood, 1993 Sixty Special, All FWD Forum Discussion, A/C problem - stuck in ECON in Past Cadillac Vehicle Discussion; 1996 Sedan Deville - Quick history... replaced blower motor... while doing so, pulled off the leads to the downward facing ...
  1. #1
    dcsalling is offline Cadillac Owners Member
    Automobile(s): Cadillac
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    A/C problem - stuck in ECON

    1996 Sedan Deville - Quick history... replaced blower motor... while doing so, pulled off the leads to the downward facing A/C switch... it was the middle of winter, so I did not fix immediately.

    Battery died, replaced with new

    Started getting warmer... no A/C

    remembered switch

    bought plug with wire leads for switch from dealer, and connected...

    Still no A/C... I hit the Auto/Econ button, and it goes to Auto for a second then right back to ECON... no apparent kick on of the compressor....

    Any ideas?

    Thanks for your help

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  3. #2
    tom altier is offline Cadillac Owners Member
    Automobile(s): 96 deville w/northstar
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    Re: A/C problem - stuck in ECON

    check your codes on the on board diagnostics. usually when it is stuck in econ, it means your low on freon, but not allways. with ignition on, press and hold the "off" and "warmer" botton, and codes will appear. be ready to write it down. you can clear the code, and "auto" will come on, but won't last long until freon is added.

  4. #3
    dirt_cheap_fleetwood's Avatar
    dirt_cheap_fleetwood is offline Cadillac Owners Master
    Automobile(s): 1990 350 Brougham (The cruiser), 1988 Mark VII LSC (The DD)
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    Re: A/C problem - stuck in ECON

    You will most likely need to clear the DTC codes. The system probably has one stored and thinks there is a problem with the AC system, so it will not turn on to prevent further damage. http://www.cadillacforums.com/forums...ull-codes.html

  5. #4
    dcsalling is offline Cadillac Owners Member
    Automobile(s): Cadillac
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    Re: A/C problem - stuck in ECON

    I pulled codes AC1312 history - AC1347 current - on a 1996 Deville with 97k, but I am not sure how to clear all codes... I find info on the codes and how to check them... but no details on what clears them. I can get to a screen that says clear PCM codes, I clear it, and the codes are still there... engine off or not..... is it triggering the code tat fast?

  6. #5
    Ranger's Avatar
    Ranger is offline Cadillac Owners Member
    Automobile(s): White Diamond '03 DHS (with DTS floor shift)
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    Re: A/C problem - stuck in ECON

    Once in the diagnostic mode, high fan = yes and low fan = no to the prompts, so CLEAR PCM CODES? should be folloed by pressing the high fan button.

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